4,5-dihydro-6h-imidazo4,5,1-ijquinolin-6-one-6- oxime-o-sulfonic acid derivatives
CA 2019841 C · Owner: Nishijima, Kazumi · Inventors: Yamamoto, Ichiro; Inaba, Hitoshi; Nishijima, Kazumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel 4,5dihydro-6H-imidazo4,5,1-ijquinolin-6-one-6-oxime-Osulfonic acid compounds, processes for producing said compounds, intermediate compounds, i.e. novel 4,5dihydro-6H-imidazo4,5,1-ijquinolin-6-one compounds and 4,5-dihydro-6H-imidazo4,5,1-ijquinolin-6-one-6oxime compounds in the synthesis of said compounds processes for producing said intermediate compounds and pharmaceutical or veterinary compositions containing said compounds. The present invention is based on the selection of the substituents of 4,5-dihydro-6H-imidazo4,5,1-ij quinolin-6-one-6-oxime-O-sulfonic acid compounds at 2-position, namely 2-(2-penten-3-yl)-, 2-cyclohexyl- 2-naphthyl-, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 26, 1990 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2012.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.